Hello, I felt this post belonged here over the horns section, although it could probably argued, anyway: I've noticed that my intonation on my C trumpet is really troublesome, it seems that the higher I play the higher the pitch seems to go. I've done this with a tuner in front of me, with several different mouthpieces, and all with the same result. When I bend the pitch down to be in tune, the sounds loses its focus and sounds bad. When talking to my colleague about it, he assured that it was the way the instrument is built, not mine, but a C trumpet in general, so I'm curious, how many of you have had this problem? I'm sure it isn't the trumpet or mouthpiece because I've tested that theory several times with the same results, so what's the answer to fixing this minor detail known as tuning? Thanks a lot folks!